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CVE-2024-35801 is a Linux kernel x86 FPU handling vulnerability caused by improper synchronization between the per-CPU cached xfd_state value and the hardware MSR_IA32_XFD register. During CPU hotplug, MSR_IA32_XFD is reset to the initial FPU-state XFD value, but the cached per-CPU xfd_state was not reset. A later xfd_update_state() operation can therefore incorrectly conclude that no MSR write is necessary. The stale hardware XFD configuration can cause an XRSTOR instruction executed in kernel context to raise a device-not-available (#NM) exception and crash the kernel.
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3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel x86 FPU state synchronization issue involving xfd_state and MSR_IA32_XFD.
Linux kernel x86 FPU state-management flaw in which xfd_state can fall out of synchronization with the MSR_IA32_XFD register.
A low-severity Linux kernel x86 FPU-state synchronization vulnerability concerning xfd_state and the MSR_IA32_XFD register.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.